SKU: 34989445835

Kicker 51KSS6904 – 6″ X 9″ 150 Watts RMS Components

Sale price$224.55 Regular price$249.50
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Ships within 48 hours · Estimated delivery Jul 20 - Jul 25

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Description

Kicker 51KSS6904 – 6″ X 9″ 150 Watts RMS ComponentsCenter Stage KICKER KS Series Speakers let you play at concert like volume, yet maintain the smoothness and subtlety to please even the most selective ear. Internally dampened polypropylene cones and durable rubber surrounds assist the woofers in creating precise midrange and bass, while high quality silk dome tweeters deliver natural, detailed highs. Experience your music as a component system with separate tweeters, or as a high end coaxial system.

Center Stage

KICKER KS-Series Speakers let you play at concert-like volume, yet maintain the smoothness and subtlety to please even the most selective ear. Internally dampened polypropylene cones and durable rubber surrounds assist the woofers in creating precise midrange and bass, while high-quality silk-dome tweeters deliver natural, detailed highs.

Experience your music as a component system with separate tweeters, or as a high-end coaxial system. The woofers’ removable bullet-style phase plug is replaced with a special adapter, allowing the 25 millimeter, silk-dome tweeters to rotate and tilt. You get more system design options and superior off-axis performance. They work best with 15 to 125 watts of recommended power. See below for more details.

High power handling
Silk-dome tweeters for a smooth sound
Polypropylene woofer and tough rubber surrounds
Thin-mount design easily fits behind factory grilles
Four tweeter mounting options
Articulating tweeter pod included
Smaller crossover makes mounting even easier
Grilles included

Specifications
Woofer [in, mm]
6×9, 160×230
Tweeter [in,mm]
1, 25
Dome Material
Silk
Rated Impedance [″]
4
Recommended Amplifier Power [Watts RMS]
15-150
Sensitivity [1W, 1m]
92
Frequency Response [Hz]
35-21k
Woofer Mounting Hole Diameter [in, mm]
5-5″8×8-7″16, 143×215
Woofer Bottom Mount Depth [in, mm]
2-15″16, 75
Flush Mount Tweeter Hole Diameter [in,mm]
1-¾, 45
Flush Mount Tweeter Depth [in,mm]
11″16 , 17
High Pass [dB], at Frequency [Hz]
12, 4,000
Low Pass [dB], at Frequency [Hz]
none
High Frequency Output Attenuation [dB]
0, 4.5, 9
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 34989445835

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4.4 ★★★★★
Based on 5 reviews
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A
Verified Purchase
Amber Teele
Birmingham, US
★★★★★ 5
Best pillow I've ever had
Size: Queen (Pack of 1)
I don't really write reviews but holy buckets, Batman. This pillow is legit. Back, neck, and shoulder pain is nothing new for me; I've had scoliosis since I was a kid and hyperflexibility in my neck since birth leading to frequent muscle spasms that have caused me to miss work. Guys. This pillow. It is the most comfortable pillow I've ever had. Like, my neck doesn't hurt and I genuinely didn't remember what that felt like. It's simultaneously supportive and soft and it doesn't sink in. The instructions are super clear to understand and the pillow fluffs up no problem if it gets a little flat. This is a game changer for me and I so hope anyone who buys this has the same experience.
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Reviewed in the United States on June 6, 2026
D
Verified Purchase
Dana K.
Draper, US
★★★★★ 5
I highly recommend this pillow, it’s great for someone with neck or back problems.
Size: Queen (Pack of 1), Size: Queen (Pack of 1)
I absolutely love this pillow! When it says it’s adjustable it definitely means that. When you first get it, it’s hard to believe that it’s going to be anything but put it in the dryer for a few minutes and it becomes so large. You will definitely have to remove some of the stuffing unless you like a really large fluffy pillow. The stuffing is high-quality and once it has been put into the dryer it becomes a fibrous type material that can be fluffed over and over and go back to the same size. It seems to be a high-quality cover on the outer portion and is thick and has a slight cooling affect. It has a separate cover on the inner portion covering the foam stuffing. I ordered this because I have neck problems and it has been super comfortable for me because I’m able to adjust it multiple times depending on my needs for the particular night when I lay down. Having the extra stuffing means that if the pillow does happen to go flat I can always add the extra that I took out when I received it. It did have a slight odor when it first came, but after putting it in the dryer, it went away immediately. I do think that’s only due to the plastic that it’s shipped in not anything with the pillow. I think this pillow is well worth it price and I would highly recommend it for anyone that is a side or back sleeper or has any type of neck problems.
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Reviewed in the United States on February 3, 2026
C
Verified Purchase
Caitlyn
Carnegie, US
★★★★★ 5
Amazing!
Size: King (Pack of 1)
Such a great pillow I’m buying another one! You can add or subtract stuffing to your liking. It’s really nice quality, quilted and soft. Best pillow ever. Super comfy and great sleep. Pretty firm with all the stuffing. Perfect the way it came with stuffing on the side. My husband loves it and now I want one.
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Reviewed in the United States on May 15, 2026
A
Verified Purchase
Alli
Lowell, US
★★★★★ 5
Totally worth the money
Size: King (Pack of 1), Size: King (Pack of 1)
Right off the bat, the packaging is absolutely adorable and felt like I was buying a premium product. I love that this pillow is adjustable and as a side sleeper, I needed a pillow that is both firm and supportive of my neck. This hits all the boxes. We will be buying more of these for our bed!
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Reviewed in the United States on June 1, 2026
K
Verified Purchase
Kindle Customer
Houston, US
★★★★★ 5
Soft and cool.
Color: Cooling Blue Cover, Size: Queen (Pack of 2)
Love this pillow set. Comfortable addition and nice and cool at all times. Going to be great for when the hot weather hits
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Reviewed in the United States on June 8, 2026

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